Avoid double reporting of files

[simsong]

Converted from SourceForge issue 2960381, submitted by jessekornblum

Hashdeep currently double reports changed files during an audit. If a file has changed, the program reports both "No match" for the new file and "Known file not used". For example:

$ ~/research/md5deep/hashdeep/hashdeep -vvak known -r tmp
/users/jessek/tmp/tmp/bar: No match
/users/jessek/tmp/tmp/bar: Known file not used

This should instead be reported as the file has changed. A 'new file found' should be reserved for a case when there was no file specified at the given path.